Category: Dagger 2

A couple months ago, during MCE³ conference, Gregory Kick in his presentationshowed a new concept of providing Subcomponents (e.g. to Activities). New approach should give us a way to create ActivitySubcomponent without having AppComponent object reference (which used to be a factory for Activities Subcomponents).
To make it real we had to wait for a new release of Dagger: version 2.7.

In Azimo Android app we use Dagger 2 as a framework for Dependency Injection to make our code architecture clean and easy to scale. Like in our previous post we would like to share our experience so today I’ll show how to avoid issues and build custom UserScope which can be used in production app.

TL;DR

Custom scopes in Dagger 2 can give better control on dependencies which should live unusual amount of time (different than application and screen lifetime). But to implement it properly in Android app we need to keep in mind things like: scope cannot live longer than application process, process can be killed by system and restored in the middle of user flow with new objects instances.

Dagger 2 — fully static, compile-time dependency injection framework is a backbone of code architecture in Azimo Android app. We already know that with growing dev team clean code structure is one of the most important things in every project. Initialisation/usage separation, easier testing (unit or functional), better scalability —those are just a few of the benefits that come from use of dependency injection framework like Dagger 2.

This post is a part of series of posts showing Dependency Injection with Dagger 2 framework in Android. Today we’re going to take a look at Dagger Producers — an extension to Dagger 2 that implements asynchronous dependency injection in Java.

#PerfMatters – recently very popular hashtag, especially in the Android world. The times when the apps just did something, no matter how, are already gone. Now everything should be pleasant, smooth and fast. For example Instagram spent almost half a year just to make its app faster, more beautiful, and more screen-size aware.